Does anyone know if the small carbon dust/particles that appear in the filtered Brita/Mavea water affect Espresso machines in any way? Does it pass through the boiler and all the inner tubings harmlessly into the portafilter?

From what I remember from these filters you need to flush them first with clean water to remove the powder before using. Once the filters are rinsed and kept damp or wet the carbon dust doesn't is not a factor, the dust come from being dry and bumped around.

And No. The tiny amount of activated charcoal dust that flows through your machine flows right throughwithout causing a problem. On Jura machines the instructions have you priming and rinsing your filter once it is in place, installed on the machine. The water from the flushing cycle looks a little grey, comes out of the steamer and presumably isn't a problem or they wouldn't have you doing it.

If the espresso machine is a HX or a dual boiler and you don't use the hot-water tap ever, then any impurities in the water will build up in the boiler. The reason for this is simple - you are constantly boiling off water into steam without ever flushing.

I make it a point to flush 4-8 oz out the hot water tap frequently (like every other day).

Does anyone know if the small carbon dust/particles that appear in the filtered Brita/Mavea water affect Espresso machines in any way? Does it pass through the boiler and all the inner tubings harmlessly into the portafilter?

It depends upon the size of the particles. We had one customer in Georgia where the particles ruined an ULKA pump right on a brand new machine. Customer blamed machine as defective, but when it was brought back and checked, we found black particles throughout the entire system. Pump was clogged and ruined.

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